body{
    background: url("../img/3.jpg");
    /*animation-name:myfirst;*/
    /*animation-duration:12s;*/
    /*!*变换时间*!*/
    /*animation-delay:2s;*/
    /*!*动画开始时间*!*/
    /*animation-iteration-count:infinite;*/
    /*!*下一周期循环播放*!*/
    /*animation-play-state:running;*/
    /*动画开始运行*/
   /*background-repeat: no-repeat;*/
    background-size: 100% 100%;
}
/*@keyframes myfirst*/
/*{*/
    /*0%   {background:url("../img/1.jpg");}*/
    /*34%  {background:url("../img/2.jpg");}*/
    /*67%  {background:url("../img/3.jpg");}*/
    /*100% {background:url("../img/1.jpg");}*/
/*}*/
.form{background: rgba(255,255,255,0.2);width:400px;margin:120px auto;}
/*阴影*/
.fa{display: inline-block;top: 27px;left: 6px;position: relative;color: #ccc;}
input[type="text"],input[type="password"]{padding-left:26px;}
.checkbox{padding-left:21px;}